ACE7260T

1.0MHz, 2A Synchronous Step-Down DC/DC Converter

VER 1.1

1

Description

The ACE7260T is a 1.0MHz constant frequency, current mode step-down converter. It is ideal for

portable equipment requiring very high current up to 2A from single-cell Lithium-ion batteries while still

achieving over 90% efficiency during peak load conditions. The ACE7260T also can run at 100% duty

cycle for low dropout operation, extending battery life in portable systems while light load operation

provides very low output ripple for noise sensitive applications. The ACE7260T can supply up to 2A output

load current at 5V input voltage and the output voltage can be regulated as low as 0.6V. The high

switching frequency minimizes the size of external components while keeping switching losses low. The

internal slope compensation setting allows the device to operate with smaller inductor values to optimize

size and provide efficient operation. The ACE7260T is offered in SOT-23-5 package, and is available in

an adjustable version.

This device offers two operation modes, PWM control and PFM Mode switching control, which allows a

high efficiency over the wider range of the load.

Features

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High Efficiency: Up to 95% (@3.3V)

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1.0MHz Constant Frequency Operation

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2A Output Current

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No Schottky Diode Required

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2.3V to 6.0V Input Voltage Range

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Output Voltage as Low as 0.6V

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PFM Mode for High Efficiency in Light Load

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100% Duty Cycle in Dropout Operation

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Low Quiescent Current: 40µA

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Short Circuit Protection

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Thermal Fault Protection

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Inrush Current Limit and Soft Start

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Input Over Voltage Protection (OVP)

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<1µA Shutdown Current

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SOT23-5 Package

Application

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Cellular and Smart Phones

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Wireless and DSL Modems

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PDAs

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Portable Instruments

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Digital Still and Video Cameras

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PC Cards